OK, let's crack this. We're given 847 and our task is to multiply it by 43. Essentially, we'll be adding 847 to itself 43 times.
Step 1: 0 + 847 = 847
Step 2: 847 + 847 = 1694
Step 3: 1694 + 847 = 2541
Step 4: 2541 + 847 = 3388
Step 5: 3388 + 847 = 4235
Step 6: 4235 + 847 = 5082
Step 7: 5082 + 847 = 5929
Step 8: 5929 + 847 = 6776
Step 9: 6776 + 847 = 7623
Step 10: 7623 + 847 = 8470
Step 11: 8470 + 847 = 9317
Step 12: 9317 + 847 = 10164
Step 13: 10164 + 847 = 11011
Step 14: 11011 + 847 = 11858
Step 15: 11858 + 847 = 12705
Step 16: 12705 + 847 = 13552
Step 17: 13552 + 847 = 14399
Step 18: 14399 + 847 = 15246
Step 19: 15246 + 847 = 16093
Step 20: 16093 + 847 = 16940
Step 21: 16940 + 847 = 17787
Step 22: 17787 + 847 = 18634
Step 23: 18634 + 847 = 19481
Step 24: 19481 + 847 = 20328
Step 25: 20328 + 847 = 21175
Step 26: 21175 + 847 = 22022
Step 27: 22022 + 847 = 22869
Step 28: 22869 + 847 = 23716
Step 29: 23716 + 847 = 24563
Step 30: 24563 + 847 = 25410
Step 31: 25410 + 847 = 26257
Step 32: 26257 + 847 = 27104
Step 33: 27104 + 847 = 27951
Step 34: 27951 + 847 = 28798
Step 35: 28798 + 847 = 29645
Step 36: 29645 + 847 = 30492
Step 37: 30492 + 847 = 31339
Step 38: 31339 + 847 = 32186
Step 39: 32186 + 847 = 33033
Step 40: 33033 + 847 = 33880
Step 41: 33880 + 847 = 34727
Step 42: 34727 + 847 = 35574
Step 43: 35574 + 847 = 36421

So, 847*43 = 36421